OSI/FTAM Programming Guide

ISO FTAM Concepts
HP NonStop OSI/FTAM Programming Guide—528612-001
2-10
Regimes and Protocol
An application program establishes the FTAM regime when it successfully initializes an
association. For the given association, the application program establishes the
file-selection regime after it successfully selects or creates a file. It establishes the
file-open regime when it successfully opens a file, and the data-transfer regime, after
successfully gaining read or write access.
The regime structure enforces logical sequences of actions. Figure 2-4 on page 2-11
shows which service primitives an application uses in which regimes and which
primitives cause a given association to move between regimes. By successfully issuing
primitives, the application program causes the association to make transitions between
regimes.
Figure 2-3. Regime Hierarchy
VST0203.vsd
FTAM Regime
File Selection Regime
File Open Regime
Data Transfer Regime